Schema: how to handle "color" element about gr8975 HOT 4 OPEN

It should be allowed in the block content model. I wil add

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@thuchacz It is already in the block content model. What validation error are you getting?

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@tcatapano When I add the "color" element in 4_r1 (it's not in the xml version in the master repository right now), I get this:

System ID: /Users/thu/Github/GR8975/xml/p004r_1.xml
Main validation file: /Users/thu/Github/GR8975/xml/p004r_1.xml
Schema: /Users/thu/Github/GR8975/schema/testentry.dtd
Engine name: Xerces
Severity: error
Description: Unexpected element "color". The content of the parent element type must match "(activity|material|material_format|profession|ref|sub_recipe|tool|unit)".
Start location: 25:28
End location: 25:33

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@thuchacz Yes, that's because the parent element is probably <purpose>, not <block>, and <color> is not available in the content model of <purpose>. Depending on what we all decide about <purpose> it seems like it should have roughly the same model as <block> except with <purpose> removed.

from gr8975.